用压力表测量容器中的压力，则表的读数表示（）。 A.实际作用于_爱下问搜题

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问题单项选择题

用压力表测量容器中的压力，则表的读数表示（）。

A.实际作用于容器器壁的绝对压力

B.容器中介质的压力和周围大气压力的差值

答案

参考答案：B

选择题

边长8分米的正方形，它的周长和面积相比，（　　）

A．面积比周长小	B．无法比较
C．一样大

完形填空

The western world has always been divided into two types of people—the cool and the uncool. It is a division that     in school. The cool kids are good at     .They are        with the opposite sex .They are good-looking and people want to     their style. They can do their homework but they don’t make a big effort. That would        be cool.
The uncool kids are in the other corner of the playground. They are very bright ,but they don’t have great     skills and they are        at sports .When they are not programming computers or doing calculus（微积分）in their heads ,they are reading comic books and watching shows like the “X Files” .They are      as the geeks.
Here’s the news. The geeks are    .Make friends with them now or they will put virus in your computer and      your maths homework to ruin. Geeks might not be popular at school, yet they do pass their examinations ,and they might not be too popular at university, but        good degrees.
The most important      of the 21st century ,computers and IT, has been at least partly created by geeks .Geek heroes like Bill Gates      others to follow their example .Being a geek is a way of earning good money .And the creation of the Internet gave them a     of their own to work and play in ,making them a global       .Besides ,the effect of the geeks         popular culture has started a new trend（趋势）.It is now cool to be      .Geek culture is becoming an important part of general popular culture ,in which what you know is more important than        you look like.
But there are also    . Geeks were often bullied or laughed at in school. Now a geek may be your boss .Perhaps it is time for    .

D．experimental

C．taking over

D．development

C．organization

A．opportunities

C．possibility

C．competition